JPH06254778A - Switch mounting structure for power tool - Google Patents

Abstract

PURPOSE:To use a handle housing also for a different type of power tool. CONSTITUTION:Switch fixing tools 20-24 protruded from the bottom surface of a lower cover 1b have horizontal support parts A and B and vertical suppression parts C and D and are formed in a wall-form or a columnar state or through combination thereof. The support part A to support and fix the single- speed switch 5 of a vibration drill is arranged to each of the fixing tools 20, 21, 23, and 24 and the suppression part C is formed at each of the fixing tools 20-24. The support part B to securely support the gear shift switch 12 of a reciprocating saw is arranged to each of the fixing tools 20, 21, and 22 and the suppression part D is formed at each of the fixing tools 20-22. A 1mm difference in a step is produced between the support parts A and B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a switch for switching a power source and a motor rotation speed in a handle housing in an electric power tool.

[0002]

2. Description of the Related Art A switch lever is attached to a housing of a handle of an electric power tool, and an operation of the switch lever turns ON / OFF a power source or switches a rotation speed of a motor. For example, the seismic drill has a single-speed switch on the handle, and the reciprocating saw has a speed change switch built-in. For the seismic drill, the switch lever is operated to press the plunger type push button of the single-speed switch to turn the power on and off. The shift switch of the reciprocating saw is configured to change the rotation speed of the motor by pulling the push button. Single speed like this,
Commercially available types of speed change switches are in widespread use, and the above-mentioned commercially available speed switches are most often used for power tools in consideration of manufacturing cost and efficiency.

[0003]

Since the commercially available type speed change switch and the single speed switch have different standards (shapes), the external shape of the handle housing is exactly the same in the vibration drill and the reciprocating saw, for example. Since the types of switches used are different as described above, the shape of the storage location (the shape of the switch mounting seat) is adjusted according to the shape of each switch in the internal structure of the housing.
Had to be changed, and eventually the handle housing had to be molded separately for each tool.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a plurality of switches having different shapes in one housing can be provided when the external shape of the handle is common and only the types of commercially available switches are different, such as a vibration drill and a reciprocating saw. It provides a mounting structure that allows it to be housed. The structure is such that mounting seats that support a plurality of switches of different shapes in a posture that can interlock with the trigger are provided on the inner wall surface of the handle housing in different steps. The switch can be selected according to the application.

[0005]

[Function] When the switch is stored on the inner wall surface of the housing,
Since the mounting seats corresponding to the respective switch standards support the respective switches, the switches having different shapes can always be stored at the predetermined position.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a vibration drill and a reciprocating saw will be described with reference to the drawings. In the drawings, the same symbols represent the same parts and components. 1 is 2
Seismic drill handle, consisting of a split housing,
FIG. 2 is an explanatory view showing a state in which the upper cover 1a is removed in the handle 1 of the reciprocating saw, and the lower cover 1b is shown.
As the mounting positions of the built-in parts, the switch mounting seat 2, the cord holding portion 3, and the control portion 4 are integrally molded. Assembling seat 2 in the vibration drill of FIG.
Is provided with a single-speed switch 5 for switching on and off the power source, and the single-speed switch 5 is operated by pushing a switch lever 6 pivotally supported by a pin 25. Reference numeral 7 is a lock button for locking the switch lever 6 at the maximum pushing position. A speed switching knob 8 and a controller 9 are housed in a storage case 10 in the control unit 4, and a base end 11a of a power cord 11 is connected to the cord holding unit 3. In the reciprocating saw of FIG. 2, a gearshift switch 12 for switching the motor rotation speed is arranged on the mounting seat 2,
On the right side of the switch lever 6, a shift knob 13 for changing the pushing amount of the switch lever 6 is rotatably supported by the lower cover 1b. In the reciprocating saw, the speed changeover is performed by the speed change switch 12, so that the speed change knob 8 of the seismic drill in the control unit 4 has the plugging member 14 at the position and the controller 9 has the heat generation connected to the speed change switch 12. Radiating plates 15 to which elements (not shown) are bonded are housed, respectively. 16 is code group 1
7 is a rubber band for preventing the variation.

3 (a) and 3 (b) are perspective views showing the structure of the mounting seat 2, and the switch fixing member 2 is provided on the bottom surface of the lower cover 1b.
0 to 24 are projected. Switch fixture 20-24
Is formed in a wall shape, a column shape, or a combination thereof having horizontal plane receiving portions A and B and vertical plane inhibiting portions C and D. As shown in FIG. 1 and FIG. 20, 21,
23 and 24 are provided with receiving portions A for supporting the single-speed switch 5 of the vibration drill in the vertical direction, and further, the fixtures 20 to 24 are provided with restraining portions C for supporting them in the horizontal direction. As shown in FIGS. 2 and 3 (b), the fixtures 20, 21, 22 are provided with receiving portions B for vertically supporting the speed change switch 12 of the reciprocating saw, and the fixtures 20 to 22 are also provided in the horizontal direction. A supporting portion D for supporting is formed. Further, since the thickness of the single speed switch 5 of the vibration drill and the speed change switch 12 of the reciprocating saw are different, a step is provided between the receiving portion A and the receiving portion B (1 mm in the present embodiment) to correct the difference, and which switch is used. However, the push button is always in a position where the switch lever 6 can be pushed. FIG. 4 is a perspective view showing the relationship between the switch lever 6 and the switch in the reciprocating saw. When the switch lever 6 is axially attached to the housing by the pin 25, the lower end portion 6c of the switch lever 6 is formed when the upper and lower covers are combined. Switch hole 18
While contacting the lower wall 18a of the switch lever 6, the protrusions 6b, 6b on both upper sides of the switch lever 6 engage with the inner wall of the switch hole 18 to prevent the switch lever 6 from rotating in the protruding direction (left direction). The push button 12a of the shift switch 12 is always in contact with the pressing piece 6a in the switch lever 6. FIG. 5 is a perspective view showing the switch mechanism of the vibration drill (lock buttons and the like are omitted).
Since the push button 5a of the single speed switch 5 is shorter than the push button 12a of the speed change switch 12, the spacer 19 is provided in front of the pressing piece 6a of the switch lever 6. When the spacer 19 is attached, the protrusion 19a above the spacer 19 protrudes from the side of the switch lever 6, and the engaging protrusion 18b provided on the inner wall of the switch hole 18 is provided.
To stop the switch lever 6 from rotating.

In the handle of the electric tool constructed as described above, when the single speed switch 5 is housed in the mounting seat 2 as described above, the single speed switch 5 is fixed to the fixture 2 as shown in FIG. 3 (a).
The fixture 20 is supported by the receiving portions A of 0, 21, 23, 24
The deviations in the lateral direction are suppressed by the suppression portions C of 24.
Further, when the speed change switch 12 is housed, the speed change switch 12 is supported by the receiving portion B of the fixing tools 20, 21, 22 as shown in FIG. This will prevent the deviation. As described above, according to this embodiment, even in the case of single speed and speed change switches having different standards, the push buttons are always in contact with the predetermined positions of the switch lever as shown in FIG. The seats can be held by correcting their respective sizes and thicknesses, and as shown in FIGS. 1 and 2, the present invention can be applied to different types of electric tools with one type of handle shape.

The shape of the mounting seat in the present invention is not limited to the spot-shaped fixing tool as in the above-mentioned embodiment, but a specific fixing tool may be a continuous wall shape, or the entire mounting seat may be a concave shape. The design can be changed as desired. Of course, it is needless to say that the number and shape of the fixtures in the above embodiment can be changed appropriately, and further, depending on the standard of the switch, it is also possible to provide an assembly seat capable of supporting three or more types of switches.

[0010]

As described above, according to the present invention, since a plurality of switches can be housed in one assembly seat, one handle housing can be shared by a plurality of electric tools, and ready-made switches can be used for each tool. Manufacturing costs and labor can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a handle of a vibration drill in the above-mentioned embodiment.

FIG. 2 is an explanatory view showing a handle of the reciprocating saw in the above embodiment.

FIG. 3A is a perspective view showing details of an assembly seat. (B) It is a perspective view which shows the detail of an assembly seat.

FIG. 4 is a perspective view showing a switch mechanism in the reciprocating saw.

FIG. 5 is a perspective view showing a switch mechanism in the vibration drill.

FIG. 6 is an explanatory view showing a state where the switch is housed in the mounting seat.

[Explanation of symbols]

1a ・ ・ Upper cover, 1b ・ ・ Lower cover, 2 ・ ・ Assembling seat, 3 ・ ・ Cord holding part, 4 ・ ・ Control part, 5 ・
・ Single speed switch, 6 ・ ・ Switch lever, 7 ・ ・ Lock button, 8 ・ ・ Speed selector knob, 9 ・ ・ Controller,
10 ... Storage case, 11 ... Power cord, 12 ... Gear change switch, 13 ... Gear change knob, 14 ...
15 ... Heat sink, 16 ... Rubber band, 17 ... Cord group, 18 ... Switch hole, 19 ... Spacer, 20-2
4 ... Fixture, 25 ... Pin, A, B ... Receiving part, C, D
..Suppression section

Claims (1)

[Claims] 1. An assembly seat for supporting a plurality of switches having different shapes in a posture capable of interlocking with a trigger is provided on the inner wall surface of the handle housing in different steps, and the switch to be assembled can be selected according to the application. Switch mounting structure for electric tools.